Cinematographic projecting apparatus



Aug. 11, 1931. G. ROUILLER ET AL CINEMATOGRAPHIC PROJECTING APPARATUSFiled June 15, 1928 5 Sheets-Sheet 1 g 1931, G. ROUILLER ET AL.1,818,432

CINEMATOGRAPHIC PROJECTING APPARATUS Filed June 13, 1.928 5 Sheets-Sheet2 Aug. 11, 1931. G. ROUILLER 51' AL CINEMATOGRAPHIC -PROJECTINGAPPARATUS Filed June 13. 1928 5 Sheets-sh af 3 Aug. 11, 1931. e.ROUILLER ET AL CINEMATOGRAPHIC PROJECTING APPARATUS 5 Sheets-Sheet 4Filed June 13, 1928 MW /Z W uz 11, 1931- G. ROUILLER ET AL 1,818,432

CINEMATOGRAPHIC PiiOJEGTING APPARATUS Filed June 13, 1928 5 Sheets-Sheet5 Patented Aug. 11, 1931 UNITED STATES PATENT OFFICE.

CINEMATOGRAPHIC PROTECTING APPARATUS Application filed June 13, 1928,Serial No. 284,999, and in France July 5,1927.

(c) Ventilation of the lamp and of the condenser through the closingdevice itself;-

(d) Framing of the picture without modifying the synchronization of theobturating device with the driving mechanism;

(e) An optical system giving the greatest possible output.

Lastly, the various parts of the apparatus are positioned in such amanner as to facilitate its upkeep to render the guiding of the filmeasier and to reduce the space taken up.

The annexed drawings show by the way of example a mode of execution ofan apparatus according to our invention.

Fig. 1 is an outside view of the apparatus (operating side) the wall ofthe fan being omitted to show the connection of the latter with thedriving shaft.

Fig. 1 is a continuation of Fig. 1 reading from the left hand extremitythereof.

Fig. 2 is a part sectional view on line 22-2 of Figures 1 and 1.

Fig. 3 is a back view of the fan.

Fig. 4 is a diagram showing the movement of the obturator-fan device.

Fig. 5 shows a modification of the fan.

As will be seen in the drawings the shaft 3 rotates in a bearing 2 inframe 1 and is actuated by a grooved pulley 4 connected to the drivingmotor. A gear 5 which rotates the gears 6 and 7 in a 1/1 ratio issecured upon the shaft 3. The gear 6 is connected with a plate 8provided with a finger 8 their driving shaftrotating in a boss of thecover 9 of a casing 10. Said plate 8 drives a Maltese cross 11 upon theshaft of which is secured a sprocket 12 designed to intermittently drawthe film forward. The casing 10 carries also a boss 10 extending axiallyfrom the shaft 3 in which is frictionally mounted an excentric sleeve 13which allows of regulating the distance between the plate 8 and theMaltese cross 11- by simply rotating it in the bore of said boss 10. Thearrangement of the boss of the casing 10 provides for the rotation ofthe latter in a bore of frame 1 and consequently for the adjustment ofthe delivery device 12 the movement of which frames or alters theposition of the picture relatively to the window of the projectingapparatus. The casing 10 when rotatably adjusted, moves the gear 6,concentrically to the driving wheel 5. As its angular position changesit causes also the angular position of the plate 8 to change relativelyto the Maltese cross 11. 14 are friction discs which come in action whenthe casing rotates. 15 is a locking nut.

The framing is produced by the rotation of the casing 10 by means of alever 16 to which said casing is connected by means of a pin, said leverbeing pivoted at 18 (Fig. 1") to a connecting rod 19 provided with atransverse groove 19 and pivoted on the other part at 20 to a lever 21made in one with a pin 22 which carries a hand lever 23.

In the example shown in Fig. 1, the casing 10 is in its upper position.When the handle 23 is moved to the right connecting rod 19 is raised andthe box 10 together with the sprocket 12 is lowered. The connecting roddraws along by means of a slide 19 a. stud 24 fixed on alever 25 pivotedat 26 with a short lever 27 carrying a stud 28 designed to shift bymeans of a sleeve 29 a sliding spiral pinion 30 in such a manner thatthe synchronism between the obturator and the film driving mechanism isnot modified by the change in the angular position of plate 8 relativelyto the Maltese cross 11, the pinion 30 coming in the driving mechanismas will be seen. Sa d pinion Whose teeth are set at 45 is rotated by aspiral toothed wheel 31 actuated by spiral pinion 32 carried togetherwith the pinion 7 upon a shaft 33 secured upon a boss of the bearing 2.The pinion 30 is mount ed upon the shaft 34 in such a manner as to bothslide upon it and rotate it. ,Said shaft 34 is mounted in bearings 35and 36; provided in two bosses of the frame 1, and: it carries upon itsend a. lever 37 which drives, on. the mo one part, the connectin rod 38by means of a crank pin 39 and, on t e other art, theobturating device40 by means 0 an axle 41- (Figs. 1 and 1). Thus when said shaft 34accomplishes a rotation of 90 corresponding to the drawings away of thepicture by the delivery device 12, the obturator 40 effects a shortermovement of 60.for example, as will be seen in Fig. 4 and then duringthe time when the picture remains exposed, the obturator rotates firstat an accelerated and afterwardsat a slower speed.

The obturating device is loosely mounted upon a pivot 42 it isconstituted by three equidistant vanes placed at 60 in the present casethus giving the smallest obturation'possible and consequently themaximum of illumination on the screen. The blades are provided with fanblades 40 which are normal to their plane but do not extend to theirperiphery in order to cover over the obturating device as much aspossible without giving an exaggerated dimension to the wings which asthey rotate in an helical receptacle 40, drive fresh air through thetube 43 in the lamp 44 and at the same time between the glasses of thecondenser 45.

Fig. 5 shows a modified form of the obturating device. In the case oflamps requiring a strong ventilation the speed of said device may bethreel hinges greater and it then comprises a e o tura blade of 180 butalso six f ilades. mg

The system which gives a varying an still obtains and in that casedrives a P1111011 that in its turn drives another pinion rotating threetimes quicker upon which the obturating device is mounted.

The lamp 46 placed at the back of the obturatmgdevlce. which divides itfrom the picture, 1s provided with a ball and socket lomt ad ustable bymeans of a knob 47. 48 is the mirror. The light rays fall on the lensesand then converge and cross each other m the tube 49. They are taken upby the lens 50 which may be adjusted in such a manner as to cause thebeam of light to converge at the focus of the lens 51', the frame ofwh1ch sl1des upon a rod 52. The adjustment 15 completed by turning aknob 53 which drives the lens carrier by the intermediary of a rack andpinion. The boss allowmg the sliding of the frame constitutes a bearmgfor the stem of the knob 53.

It is well known that in the case of very powerful lamps the diameter issuch that it requires condensers having also a large diameter which aretoo large to illuminate the picture. In the present system, the rayscommg from such a condenser cross in order to fall on the lens 50 havinga diameter which is equal to the diagonal of the picture put injuxtaposition. At the "exit the whole beam of lightis gathered in thelens this not being always possible in ordinary apparatus with largecondensers.

The path of the film 54 is as follows:

As it comes from the unrolling device the film'passes upon the guidingroller 55 and upon the roller 56 it then engages the delivery device 57which it surrounds upon a quarter of its circumference owing to theengagement of a roller'58 provided with checks with an abutment of thedelivery device 57 thus leaving a free space between the hear.

ing surface of the roller and that of the sprocket. This free spaceallows the passage of the-parts of the film where two ends are gummedtogether without exerting a pressure capable of causing the film to comeout of its path. The roller 58 carried by a lever 59 pivoted on the axle60 of the roller 56 is .always kept in engagement with the delivery 'ymeans of a spring carried upon device 57 the axle 60. The arrangement isthe same as that shown for the lower delivery device.

The upper delivery device 57 is carried by an axle 62 driven by thewheel 64 which is actuated by the pinion 30. The film then passes as itforms a flexible loop in a passage 65 being pressed upon by the 66 actedupon by the pressure of springs 67 secured to the door 68 which isclosed by a bolt 69. A pressure roller 70 elastically mounted owing tobuttonholes formed in its frame and to a spring 71 secured by a screw 72upon an axle 73 is supported by two bosses provided on the door 68.Coming out of the pasage the film moves along between the dev.

livery device 12 and the pressure roller 70 and after forming a flexibleloop it engages the lower delivery device 57 in the manner alreadydescribed concerning the upper delivery device 57. The axle 75 of thelower delivery device rotates in rings 63 fitted in bosses provided inthe frame. The spring 61 presses the roller 58 against said deliverydevice in the manner already indicated. The

film is then wound a pulley (shown in Figfno 2) 74 being provided forthis object at the end of a shaft 75 which is split at its other end toallow of its being eventually actuated by means of a handle.

It will be understood that we do not limit ourselves to the particulararrangement hereinbefore specifically described inasmuch as manymodifications may be made in the construction and arrangement of theapparatus without departing from the principle of our' ant vanes' theshaft, a link connecting the crank and pin, means to feed a film, meansto frame a picture on the film, said film feeding means and framingmeans connected with the shaft to maintain the synchronism of the filmfeeding means and obturator during framing.

2. In a cinematograph projection apparatus, an obturator havingequidistant vanes and a central axis of rotation, fan blades on thevanes, a casing for the obturator, a lantern, means to connect thelantern and easing, a pin on the obturator excentric to the axis, adriving shaft, a crank thereon, a link connecting the crank and pin, aower driven main pinion, a second pinion riven thereby, a casing, a filmdelivery mechanism in said casing and driven from said second pinion,manual means to rotatively adjust said casing and simultaneously adjustthe second pinion peripherally of the first pinion, a spiral pinionadjustable on said shaft by said manual means, a lower delivery devicedrivable from said main pinion and meshing with said spiral pinion todrive the obturator shaft, an upper delivery device driven by saidspiral pinion, said lower dclivery device arranged to be manually drivenwhen the apparatus is not driven from the power pinion.

In testimony that we claim the foregoing as our invention, we havesigned our names.

GEORGES ROUILLER. JEAN MARION.

